FreeBSD up to 11.2/11.3/12.0 bhyve e1000 Device Emulation TCP Segment memory corruption

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CTI Interest Score
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7.1$0-$5k0.00

A vulnerability has been found in FreeBSD up to 11.2/11.3/12.0 (Operating System) and classified as critical. Affected by this vulnerability is some unknown functionality of the component bhyve e1000 Device Emulation. The manipulation as part of a TCP Segment leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In FreeBSD 12.0-STABLE before r350619, 12.0-RELEASE before 12.0-RELEASE-p9, 11.3-STABLE before r350619, 11.3-RELEASE before 11.3-RELEASE-p2, and 11.2-RELEASE before 11.2-RELEASE-p13, the bhyve e1000 device emulation used a guest-provided value to determine the size of the on-stack buffer without validation when TCP segmentation offload is requested for a transmitted packet. A misbehaving bhyve guest could overwrite memory in the bhyve process on the host.

The weakness was published 08/30/2019 (Website). It is possible to read the advisory at security.FreeBSD.org. This vulnerability is known as CVE-2019-5609 since 01/07/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/10/2020).

Applying a patch is able to eliminate this problem.

Similar entries are available at 141117, 141116 and 141114.

Productinfoedit

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CPE 2.3infoedit

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CVSSv3infoedit

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2infoedit

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfoedit

01/07/2019 🔍
08/30/2019 +235 days 🔍
08/30/2019 +0 days 🔍
08/10/2020 +346 days 🔍

Sourcesinfoedit

Product: https://www.freebsd.org/

Advisory: security.FreeBSD.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2019-5609 (🔍)
See also: 🔍

Entryinfoedit

Created: 08/30/2019 03:38 PM
Updated: 08/10/2020 10:31 AM
Changes: (1) advisory_confirm_url
Complete: 🔍

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